Finding the Fourth Proportional to 1,105.52, 1,656.99 and 900.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.52 : 1,656.99 = 900.45 : x
2. Step 2: Convert to fraction form
   1,105.52/1,656.99 = 900.45/x
3. Step 3: Cross multiply
   1,105.52x = 1,656.99 × 900.45
4. Step 4: Simplify right side
   1,105.52x = 1,492,036.65
5. Step 5: Solve for x
   x = 1,492,036.65/1,105.52
6. Step 6: Final answer
   x = 1,349.63